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+<div class="subTitle">org.apache.beam.runners.core</div>
+<h2 title="Class SplittableParDo" class="title">Class SplittableParDo<InputT,OutputT,RestrictionT,TrackerT extends <a href="../../../../../org/apache/beam/sdk/transforms/splittabledofn/RestrictionTracker.html" title="interface in org.apache.beam.sdk.transforms.splittabledofn">RestrictionTracker</a><RestrictionT>></h2>
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+<li>
+<ul class="inheritance">
+<li>org.apache.beam.runners.core.SplittableParDo<InputT,OutputT,RestrictionT,TrackerT></li>
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+</li>
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+<dt>All Implemented Interfaces:</dt>
+<dd><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>, <a href="../../../../../org/apache/beam/sdk/transforms/display/HasDisplayData.html" title="interface in org.apache.beam.sdk.transforms.display">HasDisplayData</a></dd>
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+public class <span class="typeNameLabel">SplittableParDo<InputT,OutputT,RestrictionT,TrackerT extends <a href="../../../../../org/apache/beam/sdk/transforms/splittabledofn/RestrictionTracker.html" title="interface in org.apache.beam.sdk.transforms.splittabledofn">RestrictionTracker</a><RestrictionT>></span>
+extends <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><InputT>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><OutputT>></pre>
+<div class="block">A utility transform that executes a <a
+ href="https://s.apache.org/splittable-do-fn">splittable</a> <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> by expanding it into a
+ network of simpler transforms:
+
+ <ol>
+ <li>Pair each element with an initial restriction
+ <li>Split each restriction into sub-restrictions
+ <li>Assign a unique key to each element/restriction pair
+ <li>Group by key (so that work is partitioned by key and we can access state/timers)
+ <li>Process each keyed element/restriction pair with the splittable <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a>'s <code>DoFn.ProcessElement</code> method, using state and timers API.
+ </ol>
+
+ <p>This transform is intended as a helper for internal use by runners when implementing <code>ParDo.of(splittable DoFn)</code>, but not for direct use by pipeline writers.</div>
+<dl>
+<dt><span class="seeLabel">See Also:</span></dt>
+<dd><a href="../../../../../serialized-form.html#org.apache.beam.runners.core.SplittableParDo">Serialized Form</a></dd>
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+<div class="block">Creates the transform for the given original <a href="../../../../../org/apache/beam/sdk/transforms/ParDo.html" title="class in org.apache.beam.sdk.transforms"><code>ParDo</code></a> and <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a>.</div>
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+<a name="SplittableParDo-org.apache.beam.sdk.transforms.DoFn-">
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+</a>
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+<h4>SplittableParDo</h4>
+<pre>public SplittableParDo(<a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms">DoFn</a><<a href="../../../../../org/apache/beam/runners/core/SplittableParDo.html" title="type parameter in SplittableParDo">InputT</a>,<a href="../../../../../org/apache/beam/runners/core/SplittableParDo.html" title="type parameter in SplittableParDo">OutputT</a>> fn)</pre>
+<div class="block">Creates the transform for the given original <a href="../../../../../org/apache/beam/sdk/transforms/ParDo.html" title="class in org.apache.beam.sdk.transforms"><code>ParDo</code></a> and <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a>.</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>fn</code> - The splittable <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> inside the original <a href="../../../../../org/apache/beam/sdk/transforms/ParDo.html" title="class in org.apache.beam.sdk.transforms"><code>ParDo</code></a> transform.</dd>
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+<pre>public <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><<a href="../../../../../org/apache/beam/runners/core/SplittableParDo.html" title="type parameter in SplittableParDo">OutputT</a>> apply(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><<a href="../../../../../org/apache/beam/runners/core/SplittableParDo.html" title="type parameter in SplittableParDo">InputT</a>> input)</pre>
+<div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#apply-InputT-">PTransform</a></code></span></div>
+<div class="block">Applies this <code>PTransform</code> on the given <code>InputT</code>, and returns its
+ <code>Output</code>.
+
+ <p>Composite transforms, which are defined in terms of other transforms,
+ should return the output of one of the composed transforms. Non-composite
+ transforms, which do not apply any transforms internally, should return
+ a new unbound output and register evaluators (via backend-specific
+ registration methods).</div>
+<dl>
+<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
+<dd><code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#apply-InputT-">apply</a></code> in class <code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><<a href="../../../../../org/apache/beam/runners/core/SplittableParDo.html" title="type parameter in SplittableParDo">InputT</a>>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><<a href="../../../../../org/apache/beam/runners/core/SplittableParDo.html" title="type parameter in SplittableParDo">OutputT</a>>></code></dd>
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+<div class="header">
+<div class="subTitle">org.apache.beam.runners.core</div>
+<h2 title="Class SystemReduceFn" class="title">Class SystemReduceFn<K,InputT,AccumT,OutputT,W extends <a href="../../../../../org/apache/beam/sdk/transforms/windowing/BoundedWindow.html" title="class in org.apache.beam.sdk.transforms.windowing">BoundedWindow</a>></h2>
+</div>
+<div class="contentContainer">
+<ul class="inheritance">
+<li><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
+<li>
+<ul class="inheritance">
+<li><a href="../../../../../org/apache/beam/runners/core/ReduceFn.html" title="class in org.apache.beam.runners.core">org.apache.beam.runners.core.ReduceFn</a><K,InputT,OutputT,W></li>
+<li>
+<ul class="inheritance">
+<li>org.apache.beam.runners.core.SystemReduceFn<K,InputT,AccumT,OutputT,W></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<dl>
+<dt><span class="paramLabel">Type Parameters:</span></dt>
+<dd><code>K</code> - The type of key being processed.</dd>
+<dd><code>InputT</code> - The type of values associated with the key.</dd>
+<dd><code>OutputT</code> - The output type that will be produced for each key.</dd>
+<dd><code>W</code> - The type of windows this operates on.</dd>
+</dl>
+<dl>
+<dt>All Implemented Interfaces:</dt>
+<dd><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></dd>
+</dl>
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+<pre>public abstract class <span class="typeNameLabel">SystemReduceFn<K,InputT,AccumT,OutputT,W extends <a href="../../../../../org/apache/beam/sdk/transforms/windowing/BoundedWindow.html" title="class in org.apache.beam.sdk.transforms.windowing">BoundedWindow</a>></span>
+extends <a href="../../../../../org/apache/beam/runners/core/ReduceFn.html" title="class in org.apache.beam.runners.core">ReduceFn</a><K,InputT,OutputT,W></pre>
+<div class="block"><a href="../../../../../org/apache/beam/runners/core/ReduceFn.html" title="class in org.apache.beam.runners.core"><code>ReduceFn</code></a> implementing the default reduction behaviors of <a href="../../../../../org/apache/beam/sdk/transforms/GroupByKey.html" title="class in org.apache.beam.sdk.transforms"><code>GroupByKey</code></a>.</div>
+<dl>
+<dt><span class="seeLabel">See Also:</span></dt>
+<dd><a href="../../../../../serialized-form.html#org.apache.beam.runners.core.SystemReduceFn">Serialized Form</a></dd>
+</dl>
+</li>
+</ul>
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+<code><a href="../../../../../org/apache/beam/runners/core/ReduceFn.Context.html" title="class in org.apache.beam.runners.core">ReduceFn.Context</a>, <a href="../../../../../org/apache/beam/runners/core/ReduceFn.OnMergeContext.html" title="class in org.apache.beam.runners.core">ReduceFn.OnMergeContext</a>, <a href="../../../../../org/apache/beam/runners/core/ReduceFn.OnTriggerContext.html" title="class in org.apache.beam.runners.core">ReduceFn.OnTriggerContext</a>, <a href="../../../../../org/apache/beam/runners/core/ReduceFn.ProcessValueContext.html" title="class in org.apache.beam.runners.core">ReduceFn.ProcessValueContext</a></code></li>
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+</tr>
+<tr class="altColor">
+<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SystemReduceFn.html#SystemReduceFn-org.apache.beam.sdk.util.state.StateTag-">SystemReduceFn</a></span>(<a href="../../../../../org/apache/beam/sdk/util/state/StateTag.html" title="interface in org.apache.beam.sdk.util.state">StateTag</a><? super <a href="../../../../../org/apache/beam/runners/core/SystemReduceFn.html" title="type parameter in SystemReduceFn">K</a>,? extends <a href="../../../../../org/apache/beam/sdk/util/state/CombiningState.html" title="interface in org.apache.beam.sdk.util.state">CombiningState</a><<a href="../../../../../org/apache/beam/runners/core/SystemReduceFn.html" title="type parameter in SystemReduceFn">InputT</a>,<a href="../../../../../org/apache/beam/runners/core/SystemReduceFn.html" title="type parameter in SystemReduceFn">OutputT</a>>> bufferTag)</code> </td>
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+<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
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+<th class="colFirst" scope="col">Modifier and Type</th>
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+<div class="block">Create a factory that produces <a href="../../../../../org/apache/beam/runners/core/SystemReduceFn.html" title="class in org.apache.beam.runners.core"><code>SystemReduceFn</code></a> instances that that buffer all of the
+ input values in persistent state and produces an <code>Iterable<T></code>.</div>
+</td>
+</tr>
+<tr id="i1" class="rowColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SystemReduceFn.html#clearState-org.apache.beam.runners.core.ReduceFn.Context-">clearState</a></span>(<a href="../../../../../org/apache/beam/runners/core/ReduceFn.Context.html" title="class in org.apache.beam.runners.core">ReduceFn.Context</a> c)</code>
+<div class="block">Called to clear any persisted state that the <a href="../../../../../org/apache/beam/runners/core/ReduceFn.html" title="class in org.apache.beam.runners.core"><code>ReduceFn</code></a> may be holding.</div>
+</td>
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+<td class="colFirst"><code>static <K,InputT,AccumT,OutputT,W extends <a href="../../../../../org/apache/beam/sdk/transforms/windowing/BoundedWindow.html" title="class in org.apache.beam.sdk.transforms.windowing">BoundedWindow</a>><br><a href="../../../../../org/apache/beam/runners/core/SystemReduceFn.html" title="class in org.apache.beam.runners.core">SystemReduceFn</a><K,InputT,AccumT,OutputT,W></code></td>
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+ <a href="../../../../../org/apache/beam/sdk/util/AppliedCombineFn.html" title="class in org.apache.beam.sdk.util">AppliedCombineFn</a><K,InputT,AccumT,OutputT> combineFn)</code>
+<div class="block">Create a factory that produces <a href="../../../../../org/apache/beam/runners/core/SystemReduceFn.html" title="class in org.apache.beam.runners.core"><code>SystemReduceFn</code></a> instances that combine all of the input
+ values using a <a href="../../../../../org/apache/beam/sdk/transforms/Combine.CombineFn.html" title="class in org.apache.beam.sdk.transforms"><code>Combine.CombineFn</code></a>.</div>
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+<div class="block">Returns true if the there is no buffered state.</div>
+</td>
+</tr>
+<tr id="i4" class="altColor">
+<td class="colFirst"><code>void</code></td>
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+<div class="block">Called when triggers fire.</div>
+</td>
+</tr>
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+ state.</div>
+</td>
+</tr>
+<tr id="i6" class="altColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SystemReduceFn.html#processValue-org.apache.beam.runners.core.ReduceFn.ProcessValueContext-">processValue</a></span>(<a href="../../../../../org/apache/beam/runners/core/ReduceFn.ProcessValueContext.html" title="class in org.apache.beam.runners.core">ReduceFn.ProcessValueContext</a> c)</code>
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+ values using a <a href="../../../../../org/apache/beam/sdk/transforms/Combine.CombineFn.html" title="class in org.apache.beam.sdk.transforms"><code>Combine.CombineFn</code></a>.</div>
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+<div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/beam/runners/core/ReduceFn.html#processValue-org.apache.beam.runners.core.ReduceFn.ProcessValueContext-">ReduceFn</a></code></span></div>
+<div class="block">Called for each value of type <code>InputT</code> associated with the current key.</div>
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+<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
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/code></dd>
+<dt><span class="throwsLabel">Throws:</span></dt>
+<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
+</dl>
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+<h4>prefetchOnTrigger</h4>
+<pre>public void prefetchOnTrigger(<a href="../../../../../org/apache/beam/sdk/util/state/StateAccessor.html" title="interface in org.apache.beam.sdk.util.state">StateAccessor</a><<a href="../../../../../org/apache/beam/runners/core/SystemReduceFn.html" title="type parameter in SystemReduceFn">K</a>> state)</pre>
+<div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/beam/runners/core/ReduceFn.html#prefetchOnTrigger-org.apache.beam.sdk.util.state.StateAccessor-">ReduceFn</a></code></span></div>
+<div class="block">Called before <a href="../../../../../org/apache/beam/runners/core/ReduceFn.html#onTrigger-org.apache.beam.runners.core.ReduceFn.OnTriggerContext-"><code>ReduceFn.onTrigger(org.apache.beam.runners.core.ReduceFn<K, InputT, OutputT, W>.OnTriggerContext)</code></a> is invoked to provide an opportunity to prefetch any needed
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de></dd>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>state</code> - Context to use prefetch from.</dd>
+</dl>
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+<div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/beam/runners/core/ReduceFn.html#onTrigger-org.apache.beam.runners.core.ReduceFn.OnTriggerContext-">ReduceFn</a></code></span></div>
+<div class="block">Called when triggers fire.
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+ <p>Implementations of <a href="../../../../../org/apache/beam/runners/core/ReduceFn.html" title="class in org.apache.beam.runners.core"><code>ReduceFn</code></a> should call <a href="../../../../../org/apache/beam/runners/core/ReduceFn.OnTriggerContext.html#output-OutputT-"><code>ReduceFn.OnTriggerContext.output(OutputT)</code></a> to emit
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d>
+<dt><span class="throwsLabel">Throws:</span></dt>
+<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
+</dl>
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+<div class="block">Called to clear any persisted state that the <a href="../../../../../org/apache/beam/runners/core/ReduceFn.html" title="class in org.apache.beam.runners.core"><code>ReduceFn</code></a> may be holding. This will be
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+<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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+</div>
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+<li><a href="package-summary.html">Package</a></li>
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